Congratulations on using the circle hooks and for posting the pics. Here are some comments to provide additional info and hopefully to stimulate discussions about these great hooks.
As shown in your pic, circlehooks have their points turned approximately at right angles to the shaft of the hook and the point may be offset (2-5 degrees) to the side slightly to facilitate catching on the fish lip or jaw. Their shape also reduces bottom snagging. The size of the gap between the point of the hook can vary considerablely so you can select the right hook for your bait and the size and species of fish you are after.
It was great to be able to chat with you and provide you with some circlehooks and some information about fishing circlehook tackle. You have made some very keen observations about these hooks and I am certain you will be rewarded both with more great fish and greater personal satisfaction at being able to release more fish essentially unharmed.
I started making jigs and various rigs with circlehooks last year after a year of reading and research and when I was finally able to get an assured supply of quality hooks made by several manufacturers. I was never able to find an assured source of quality circlehooks in Canada but did locate a few packages of 4-6 hooks each at grossly inflated prices (35-50 cents per hook!) in Saskatoon. As a wholesaler and manufacturer I now buy in circlehooks in bulk as well as prepacked for retail sale.....so I can say that circlehooks are now available in Nipawin, if no where else, at the local True Value and CoOp retail stores. I also just recently was able to place some circlehook jigs in the Canadian Tire Store in Prince Albert so I am slowly getting these distributed, albeit only in NE Saskatchewan so far.
Circlehook shapes and sizes vary between manufacturers so it takes some trial and error to get experienced with selecting the type and size that you most effectively match to the species you are fishing and the fishing conditions. I have caught walleye on sizes #6 to #2/0 (I debarb all my hooks) and prefer the larger sizes such as #2-1/0 as they are easier to bait up and will catch large or smaller walleye with less chance of being deep swallowed. The larger sizes also hold live bait better even when debarbed.
Indeed circlehooks are a bit different to fish, especially if you are seasoned angler with so may years of being taught over and over to set a "J" hook with a sharp jerk. For pike I make jigs and rigs with circlehooks in sizes 2/0-5/0 but stock larger sizes as well for custom rigs. Being patient enough to let the fish generate the right hook-setting tension on the line is not easy but with practice and discipline you will get rewarded with just as many fish and very few with any serious injury.
I recently found that bait fishing with circlehook jigs/rigs was made very simple by using a bobber. As fish pull away with the bait the bobber provides almost a perfect line tension and allows the circlehook to be set shallow in the fishes lip or jaw. Just letting the fish pull slightly and submerge the bobber seems to be the secret right signal to just lift your pole and maintain tension as you reel in. Even when made barbless these circlehooks hold your fish better than any comparable barbless "J" hook and they can be removed so easily and quickly. In short, they look like a great tool to reduce deep hook swallowing and the best hook for freshwater catch and release bait fishing. What a great system for teaching your kids a better way to fish and have them learn to catch and release fish with little injury! Without a bobber it takes a bit more skill to feel when the tension is just right for starting your retrieve (and I am still learning!). But, that's fishing......it differs from day to day, place to place so it takes some practice.
For additional info about how to use circle hooks have a look at the following website where Craig Kivi posts data for the Circle Hook Conservation Group:
http://goldendrake.com/category/circle-hooks/ .
I hope that others who have tried circlehooks will post their comments and experiences or any questions they might have about using these hooks.